rec.autos.simulators

> Steve B.

> On Fri, 09 Apr 1999 09:44:19 -0400, Michael Barlow

> >    270*?  My Thrustmaster T2 only has a little over 180* lock to lock.
> >Unless I'm missing something in the post.  Or there is more to offer in
> >the T2 by taking the stops out. (?)

> Remove "edy" from address for email

> Hi Randy

> what you have just described is called POWER STEERING
> in the real world.
> In power steering setups nowadays, they have speed
> sensitive
> power inputs.
> High speed = low power assistance
> Low speed= more power assistance

> GPL in its old days should not have power steering.
> I think we just found a bug !!!!!

> article



> | > I think 60 mph is too fast for the cutout of the
> effect.
> | > Sometimes if I slide in a slow turn, I can see that the
> | > wheels aren't turning all the way to the locks, even
> | > though I have the wheel turned all the way.  That makes
> | > it hard to catch the spin.  Seems like the effect
> should
> | > be completely eliminated by the time you hit about 15
> mph.
> |
> | I think I still haven't explained this well enough yet.
> |
> | Perform this experiment...
> |   Go to Monza.
> |   Change your car setup so that the steering ratio is
> numerically as
> | low as it will go.
> |   Get into the car.
> |   While sitting still, turn the wheel to the lock.
> |   Note how far the front wheels deflect.
> |   Get out of the car.
> |   Change your car setup so that the steering ratio is
> numerically as
> | high as it will go.
> |   Get into the car.
> |   While sitting still, turn the wheel to the lock.
> |   Note that the front wheels have deflected exactly the
> same amount as
> | before.  WTH?
> |   Now, blast down the front straight at high speed.
> |   Lock up your brakes so that your car will continue
> straight down the
> | track.
> |   Turn your wheel to either lock and hold it there.
> |   While still moving at high speed, look at how much your
> front wheels
> | have deflected.  Note that it's much less than when you
> were sitting
> | still.
> |   Get out of the car.
> |   Change the car setup again so the steering ratio is
> numerically as
> | low as it will go.
> |   Blast down the front straight again, lock the brakes,
> and turn the
> | wheel to either lock.
> |   While still moving at high speed, note that your front
> wheels have
> | turned much more than when you were moving at high speed
> before, but
> | still not as much as when you were stopped.
> |   Continue to keep the brakes locked, and continue to
> hold the wheel at
> | its stop.
> |   As you slow down, note that once you get below ~60MPH,
> your front
> | wheels begin to deflect more and more, even though you're
> holding the
> | wheel steady.
> |   Hmmmm....
> |
> | What can be inferred from these observations?
> |
> | (1) The steering ratio while at a stop is not governed by
> the steering
> | ratio defined by the car setup.
> | (2) The steering ratio while at a stop is significantly
> lower (faster)
> | than what you can select on the car setup screen.
> | (3) Since the amount of front wheel deflection only
> begins to increase
> | as the vehicle speed decreases through ~60MPH, this
> effect is only
> | applied below that speed.  Above that speed, the steering
> ratio you've
> | defined for the car setup rules.
> | (4) If the maximum speed at which these shenanigans are
> applied is
> | reduced to ~15MPH from ~60MPH, you would have even *less*
> available
> | front wheel deflection to try and catch a low-speed (>
> ~15MPH, <
> | ~60MPH) spin.
> |
> | Ok, so that was a bit long winded.  But the experiment is
> informative
> | :-)
> |
> | Randy
> |